[CentOS] Upgrading CentOS 5.2 to use gcc 4.x

    I have a CentOS 5.2 installation with gcc 3.4.6 as the default.  I'd
like to upgrade the entire gcc tool chain, including libraries, to 4.x in
order to build some software that requires 4.1.0 or better.  Can I do this
easily through yum?  If I upgrade to 5.3 will I get gcc 4.x by default?

Thanks,

Patrick